Last night we were treated to the twist-packed mind-melting final episode of Line of Duty series four. And from Roz Huntley’s confession to Ted Hastings’ super pistol aim, to the unveiling of the balaclava man men, the BBC’s corrupt cop drama gave everything viewers wanted: TV drama at its best.

And although cops Steve Arnott (Martin Compston), Kate Fleming (Vicky McClure) and Ted Hastings (Adrian Dunbar) saved AC-12 by the episode’s end, some said they should put their efforts into another role…